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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Current assets:    
Cash and cash equivalents $ 41,839 $ 55,698
Short-term investments 11,138 11,286
Accounts receivable, net 487,685 495,276
Prepaid expenses 9,822 11,051
Other current assets 11,954 13,817
Total current assets 562,438 587,128
Investments 87,225 78,975
Property and equipment, net 108,261 103,068
Goodwill 3,946,103 3,845,157
Intangible assets, net 660,383 668,529
Other assets 60,475 56,543
Total assets 5,424,885 5,339,400
Current liabilities:    
Accounts payable and accrued expenses 256,321 407,938
Current portion of long-term debt and capital lease obligations 24,356 22,054
Income taxes payable 47,936 18,957
Total current liabilities 328,613 448,949
Line of credit 985,000 783,500
Long-term debt and capital lease obligations, net 892,996 900,128
Long-term professional liabilities 173,895 173,080
Deferred income taxes 234,461 227,802
Other liabilities 47,450 45,174
Total liabilities 2,662,415 2,578,633
Commitments and contingencies
Shareholders' equity:    
Preferred stock; $.01 par value; 1,000 shares authorized; none issued
Common stock; $.01 par value; 200,000 shares authorized; 92,904 and 93,718 shares issued and outstanding, respectively 929 937
Additional paid-in capital 979,032 974,304
Retained earnings 1,782,509 1,785,526
Total shareholders' equity 2,762,470 2,760,767
Total liabilities and shareholders' equity $ 5,424,885 $ 5,339,400